I was recently sent a firmware file that’s in early testing and from that it seems DJI are testing Real Time Kinematic ( RTK ) on either the M600 or a new craft. It’s highly unlikely this will ever appear for the Phantom 4 but a small possibility for a future Phantom 5 and more likely so the next generation Inspire ( Inspire 2 ). This type of system has application possibilities in land survey and in hydrographic survey.
DJI have previously announced RTK with the Matrice 600 mentioning the A3 can be upgraded to use the technology. So it’s good to see DJI are not actively testing this meaning it will likely be seen in production.
DJI also have a recent Trademark for D-RTK – https://trademarks.justia.com/868/98/d-86898900.html
Real Time Kinematic satellite navigation is a technique used to enhance the precision of position data derived from satellite-based positioning systems (global navigation satellite systems, GNSS) such as GPS, GLONASS, Galileo, BeiDou, and GAGAN. It uses measurements of the phase of the signal’s carrier wave, rather than the information content of the signal, and relies on a single reference station or interpolated virtual station to provide real-time corrections, providing up to centimetre-level accuracy. With reference to GPS in particular, the system is commonly referred to as Carrier-Phase Enhancement, or CPGPS.